1.Advanced Anti-Fog &UV Protection:The Swim Goggle’s inner lenses are coated with the latest anti-fog treatment to let you see clearly underwater without blurring or distortion. The outer surfaces mirrored coating lenses with UVA/UVB protection which can help protect your eyes from being hurt by UV and bright lights. Convenience for you both indoor and outdoor swimming. 2.No Leaking: Premium silicone material and 3D Ergonomic Design used on the goggles ensure a snug fit on different facial forms and perfectly prevent water leakage. High quality materials to prevent breakage. 3.Super HD Vision: The goggles use high-performance polycarbonate high-definition lenses to ensure you a more comfortable swimming experience clearer and more natural vision with no misting or glare and reduce visual fatigue. 4.Super Comfortable to Wear: The goggles strap made of high quality soft silicone with extra length and fixing clip that can be changed as needed without squeezing or rubbing. The strap has anti-slip particles to keep the position of the goggles fixed. Suitable for various head shapes and noses let you have a better swimming experience.